91073612851 has 16 divisors (see below), whose sum is σ = 98255646720. Its totient is φ = 83916934560.

The previous prime is 91073612843. The next prime is 91073612857. The reversal of 91073612851 is 15821637019.

It is a cyclic number.

It is not a de Polignac number, because 91073612851 - 2³ = 91073612843 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91073612798 and 91073612807.

It is not an unprimeable number, because it can be changed into a prime (91073612857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23573946 + ... + 23577808.

It is an arithmetic number, because the mean of its divisors is an integer number (6140977920).

Almost surely, 2^91073612851 is an apocalyptic number.

91073612851 is a deficient number, since it is larger than the sum of its proper divisors (7182033869).

91073612851 is a wasteful number, since it uses less digits than its factorization.

91073612851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6666.

The product of its (nonzero) digits is 90720, while the sum is 43.

The spelling of 91073612851 in words is "ninety-one billion, seventy-three million, six hundred twelve thousand, eight hundred fifty-one".